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• Windows 7 loses access to network drives

  - by dubRun

  Ok this is an odd one, but is happening often enough its getting quite annoying. I recently installed Windows 7 on my work computer (about 2 months ago) and every so often I lose access to network shares on our work network. Its one server in particular - other shares are still working fine. I have a number of folders mapped as a drive, and all of the ones on a particular file server have lost access. If I try to access the machine directly (\fileserver\d$) it doesn't work either with this message: Windows cannot access \fileserver\d$. You do not have permission to access \fileserver\d$. Contact your network administrator to request access Once I reboot the computer, access is restored like it should be. The computers are all on a domain and my user has administrator level access to the server in question.

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• SQL 2008 Replication over Internet

  - by Akash Kava

  We have decided to put our servers in data centers on east and west coast of US, to keep high level redundancy. After evaluating number of replication options, apart from VPN there is no other way to do replication for SQL Server. We are investigating VPN but I have following questions. Our Large DB consists of media information (pictures/movies/audio/pdf) etc, so we are not very concerned about security because they are not financial sensitive data. SQL 2005 supports or can be configured to support replication over internet? If Yes then should we downgrade to 2005? If SQL 2008 Publisher is configured for Web Sync, can we write an automatic program (C# Windows Service) to act as pull subscriber and run on the subscriber server and replicate subscriber database? Or are there any API available in SQL where we can write our own program to do replication in very generic way? (In a nut shell, can we write our own C# Windows Service based Subscriber program?)

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• Apache service hung and incoming requests not accepted

  - by Gnanam

  Hi, My production server is running Apache v2.2.4 with mod_mono v1.2.4 on CentOS release 5.2 (Final). Suddenly, Apache service hung during normal usage time (approx. 1 pm EDT). Traffic is not too high at this time. This is the first time we're noticing this kind of behaviour in our server. I noticed from access log that even subsequent requests are also not received, even though there were incoming requests. I then manually tried to invoke my application call from web browser, it never returned successfully but it was still loading. I found no unusual behaviour/activity in: 1) Apache access_log and error_log 2) No kernel level errors found in /var/log/messages I've no other option but ended up restarting Apache service. Any idea on what would cause Apache to hang and thereby not allowing subsequent incoming requests? How do I debug/diagnose when this happens next time? Experts advice/recommendation on this are highly appreciated.

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• Postgres error messages in Apache error log

  - by Warren Pena

  I'm running Apache 2.2, PHP 5.2, and Postgres 8.2 on Windows, and I'm seeing something funky in Apache's error.log file. Occasionally, I'll see the message "row number -1 is out of range 0..-1" pop up over and over. Unlike all the other lines in that log file, there's no timestamp or log level. Just that exact string. Googling around, it appears that message is, character for character, a common Postgres error message, but is not an Apache error. I've seen it happen multiple times, and on several different servers. I can't seem to reproduce it, though. I've tried throwing all sorts of error ridden database queries and result set inquiries at Postgres via PHP, and none of them seem to trigger that line being written to the log file. Is it possible for Postgres errors to be ending up in my Apache log file, and if so, how? What would trigger an error message like that? Thanks!

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• Why does httpd handle requests for wrong hostnames in SSL mode?

  - by Manuel

  I have an SSL-enabled virtual host for my sites at example.com:10443 Listen 10443 <VirtualHost _default_:10443> ServerName example.com:10443 ServerAdmin [email protected] ErrorLog "/var/log/httpd/error_log" TransferLog "/var/log/httpd/access_log" SSLEngine on SSLProtocol all -SSLv2 SSLCipherSuite HIGH:MEDIUM:!aNULL:!MD5 SSLCertificateFile "/etc/ssl/private/example.com.crt" SSLCertificateKeyFile "/etc/ssl/private/example.com.key" SSLCertificateChainFile "/etc/ssl/private/sub.class1.server.ca.pem" SSLCACertificateFile "/etc/ssl/private/StartCom.pem" </VirtualHost> Browsing to https://example.com:10443/ works as expected. However, also browsing to https://subdomain.example.com:10443/ (with DNS set) shows me the same pages (after SSL certificate warning). I would have expected the directive ServerName example.com:10443 to reject all connection attempts to other server names. How can I tell the virtual host not to serve requests for URLs other than the top-level one?

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• Tips on self-learning boot-time fundamentals (grub, disks, partitions, LVMs, etc)?

  - by Harry

  Is there any good resource which I can use to self-learn all the low-level system administration details on Grub, Grub2, disks, partitioning, LVM, etc? I'm comfortable with system admin tasks post-boot but I lack knowledge about both the fundamentals and actuals of all that happens during boot on a Linux system such as Fedora. Any recommendations on how to setup a testbed on my desktop for learning the above? I may not be able to get another machine / harddisk, so may have to rely on something like VirtualBox. But don't know if there are other (better) options... so asking for tips from those who have self-learned / mastered this track themselves.

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• Entering IT field with only hobby experience?

  - by EA Bisson

  I can build computers, install servers, network mac, linux, and windows, build servers, do support etc. I do all of this at home/for friends/for hobbies. I have worked with computers every day since I was in elementary school (commodore 64, windows 3.1 etc.). I have IT bachelors in administrative management (so basically nothing good). I am getting another bachelor's in server admin, including about 5 certifications. I am the IT go to gal at every position usually because I know more than the IT people and have better people skills. My job history is random: office admin, hair braider, disney ride operator, camp counselor etc. I found a job I want its a entry level specialist (server) position. What do I put on a resume?

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• What's the entry path towards a database administrator job?

  - by FarmBoy

  I've recently lost my job, and I'm working towards changing vocations. My degrees are in Mathematics, but I'm interested in IT, particularly working as a DBA or a programmer. I don't have IT experience, but I have the resourses to be patient with the transition, and I'm currently learning SQL and Java. Obviously, I need some job experience. My question is this: What entry-level jobs might allow me to gain useful experience towards obtaining a DBA job? It seems to me that programmers often start as testers, and system administrators could start at a help-desk position, but it is unclear how one begins to work with a company's database.

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• IIS7 Compression Configuration

  - by Level1Coder

  Hi, Previously when I used IIS6, I used IIS6 Metabase Explorer to edit Metabase.xml and manually turned on compression, specified the compression level and the file extensions to compress. IIS7 seems a bit different, there is no Metabase.xml file in the system32\inetsrv folder. Enabling compression is easy to turn on by checking the checkbox in the Compression module. But how do I manually tweak and set the compression levels and file extensions to compress? I also ran across an article saying that IIS7 also automatically throttles the compression if your CPU load is 50% then compression is turned off. Where are all these settings located?

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• Problem with MSDE 2000 5 minute keepalive over ISDN

  - by mcrick

  We have a SQL Server transactionally pushing replicate data to an MSDE 2000 SP3a subscriber over ISDN. Prior to a recent upgrade to bring us to the MSDE 2000 level we pushed to MSDE 1. We are finding that there is now a 5 minute keepalive being instigated from MSDE 2000 which we cannot account for. Further, we can find no way to either disable it or lengthen the keepalive interval. Not surprisingly, we are finding a marked increase in ISDN line costs due to these previously non-existent keepalive packets! Please note that we are assuming that it is an MSDE 2000 server issue, but it could equally be some behaviour related to the way that replication is operating on MSDE 2000. Unfortunately, as yet, we have not identified a replication configuration parameter that affects the keepalive in any way. Can anyone advise how we might indentify a root cause for this problem (and ideally a fix)?

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• Problem with MSDE 2000 5 minute keepalive over ISDN

  - by mcrick

  We have a SQL Server transactionally pushing replicate data to an MSDE 2000 SP3a subscriber over ISDN. Prior to a recent upgrade to bring us to the MSDE 2000 level we pushed to MSDE 1. We are finding that there is now a 5 minute keepalive being instigated from MSDE 2000 which we cannot account for. Further, we can find no way to either disable it or lengthen the keepalive interval. Not surprisingly, we are finding a marked increase in ISDN line costs due to these previously non-existent keepalive packets! Please note that we are assuming that it is an MSDE 2000 server issue, but it could equally be some behaviour related to the way that replication is operating on MSDE 2000. Unfortunately, as yet, we have not identified a replication configuration parameter that affects the keepalive in any way. Can anyone advise how we might indentify a root cause for this problem (and ideally a fix)?

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• Email Servers that Abstracts Mailbox Concepts [on hold]

  - by David

  Lately I've been really interested in doing some very unique things with email most of which rely on a SMTP and POP or IMAP server that gives the administrator an API to create arbitrary methods for email storage, notifications, or delivery. What I'm looking for would be analogous to mod_php and apache where apache handles the delivery protocol and php handles the content creation and storage. I've considered making my own, as those three protocols are quite simple, but I'm always nervous about putting my code public facing especially when it's at that low of a level. So are there any email servers that allow for this much arbitrary control over email delivery, fetching, and receiving.

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• where to look for computer technician jobs

  - by Kareem

  Hi I am currently studying for the A+ certification, I plan to have it by the end of this month and I plan to go for farther education. I’ve built two high end computers by myself for a friend and family member. Install OS and everything. I’m looking in to finding either a computer assembly or computer technician job . Where is the best place to look for one? I’ve looked in to best buy but I find their geek squad to be a little bit shady. Where is a good place to look for a full time entry level computer technician job just starting out in Tampa, FL?

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• Nearest PC equivalent to Mac Target Disk Mode?

  - by username

  Mac firmware has a special boot mode that allows you to offer its internal hdd to another computer as an external disk (you just connect the two machines via an IEEE 1394 cable). Only the second machine needs a functioning OS installed. Any good suggestions for something similar on the PC side of things? Block level access isn't important to me, I'd just like to be able to copy files off it. It doesn't matter to me if it uses Ethernet, IEEE 1394, or wifi - I just like having a quick way to access files on a client PC. Is there any single-purpose Linux distro specially designed to do this? It'd be nice to have something super simple, quickbooting, and small that I could install on a USB drive. I used to use Knoppix, but it's overkill as a Target Mode replacement.

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• Upgrading my Active Directory domain from Server 2003 to Server 2008 R2

  - by drpcken

  We are currently a single domain on a single network running Server 2003 Standard and Exchange 2007. I have a new server up and running (added to the domain already) with Server 2008 R2 on it. I want this to become my Primary Domain Controller, thus replacing my old Server 2003 server. I know I should just be able to run dcpromo on the new server, then decomission my old server, and raise my domain functional level to match the 2008 server. My only concern is the Exchange 2007 server. Is there anything I need to know relevant to it before I start? Thanks!

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• Is there a way to create a copy-on-write copy of a directory?

  - by BCS

  I'm thinking of a situation where I would have something that creates a copy of a directory, tweaks a few files, and then does some processing on the result. This wold be done fairly often, maybe a few dozen times a day. (The exact use case is testing patch submissions; dupe the code, patch it, build/test/report/etc.) What I'm looking for could be done by creating a new directory structure and populating it with hard links from the origonal. However this only works if all the tools you use delete and recreate files rather than edit them in place. Is there a way to have the file system do copy-on-write for a file? Note: I'm aware that many FSs use COW at a block level (all updates are done via writes to new blocks) but this is not what I want.

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• CentOS listen to everything on the wire

  - by Poni

  I know there's a native command on linux that will output (to stdout) every "event" related to a certain network interface (be it eth0 etc'). Like there's tail -f <file> to listen on file changes.. I just can't find it. I want to see all events, incoming packets, even dropped ones. At lowest level possible. In every protocol (TCP, UDP etc'). I think WireShark is a bit too big for this as I need something very simple just to see the events, it's for testing. What's the command?

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• What is the most economic hardware that will run Ubuntu? [closed]

  - by nbolton

  I'm looking to buy the cheapest hardware I can find that will run the latest version of Ubuntu desktop on some sort of usable level (e.g. use of web browser, flash, etc). I guess small form factor would be pretty convenient, so I was looking at Acer Aspire Revo for example, but I'm not sure whether or not it's overpriced. I'd rather pay less for the same thing minus brand name if it's available. Any ideas? On further investigation, it seems I'm looking for a nettop.

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• dead man's switch for remote networking interventions

  - by ascobol

  Hi, As I'm going to change the network configuration of a remote server, I was thinking of some security mechanisms to protect me from accidentally loosing control on the server. The level-0 protection I'm using is a scheduled system reboot: # at now+x minutes > reboot > ctrl+D where x is the delay before reboot. While this works relatevly well for very simple tasks like playing with iptables this method has at least two drawbacks: It's not very reactive, ie a connectivity problem should be detected automatically if for example an automatic remote ssh command fails does not work anymore for x seconds. It can obviously not work if one need to modify some configuration files and then reboot to test the changes. Are you guys using some tool for the second point ? I would love to have something able to revert the system configuration in a previously known stable state if I can't join the server X minutes after reboot. Thanks!

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• How to add timestamp to the logfilename with the apache log4j

  - by swati

  Hello Everyone, I am new to using apache logger . I have downloaded the log4j-xx and i have the following text configuration file # Set root logger level to DEBUG and its only appender to mainFormat. log4j.rootLogger = TRACE, mainFormat, FILE # mainFormat is set to be a ConsoleAppender. log4j.appender.mainFormat=org.apache.log4j.ConsoleAppender # mainFormat uses PatternLayout. log4j.appender.mainFormat.layout=org.apache.log4j.PatternLayout log4j.appender.mainFormat.layout.ConversionPattern=%d [%t] %-5p %c - %m%n #File makes a file of the output. log4j.appender.FILE=org.apache.log4j.FileAppender log4j.appender.FILE.File=log4j_HAPR001_OutputFile.log log4j.appender.FILE.layout=org.apache.log4j.PatternLayout log4j.appender.FILE.layout.ConversionPattern=%d [%t] %-5p %c - %m%n i use the above config file to create the log file. Now i wanted to add the current time stamp to the log file. Is there any way to do this. If yes can some one please give me the instructions how to do. Thanks in advance. Regards, Swati

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• USB microphone very quiet in Windows 7 64bit [migrated]

  - by Brian Harris

  My microphone input is very quiet. I record my voice and the recording comes out very faint. I can barely see the level indicator move when I'm 4 inches away, only when I'm 0.5 inches away does it pick up well enough. Motherboard: P8Z68-V Windows 7 64bit Mic: http://www.amazon.com/Logitech-Desktop-Microphone-Black-Silver/dp/B00009EHJV/ I've been searching the net and lots of people have this problem but I don't see any solutions that work. Maybe this isn't the best forum for a question like this, if not then let me know.

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• Nexus One USB freezes Vista SP2 Quad Core

  - by user25479

  My Nexus One (N1) will occasionally freeze my Vista 32bit SP2 Quad Core 2.4GHz during POST. MB is ASUS P5N-E SLI with 4GB of RAM. The PC will be booting and when I connect the N1 via USB, the boot sequence will freeze, then continue once I unplug the N1 USB link. It happens whether the N1 is in USB debugging mode and when it is not. I'm not sure whether this is an N1 hw/fw issue, system interaction with my PC, or a result of my N1 development environment (I'm using the Eclipse Galileo IDE for Java Developers, primarily compiling to API Level 7. Eclipse has also occasionally frozen although I haven't established N1 USB cause-and-effect on that issue). Is anyone else experiencing these symptom?

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• Postgres error messages in Apache error log

  - by Warren Pena

  I'm running Apache 2.2, PHP 5.2, and Postgres 8.2 on Windows, and I'm seeing something funky in Apache's error.log file. Occasionally, I'll see the message "row number -1 is out of range 0..-1" pop up over and over. Unlike all the other lines in that log file, there's no timestamp or log level. Just that exact string. Googling around, it appears that message is, character for character, a common Postgres error message, but is not an Apache error. I've seen it happen multiple times, and on several different servers. I can't seem to reproduce it, though. I've tried throwing all sorts of error ridden database queries and result set inquiries at Postgres via PHP, and none of them seem to trigger that line being written to the log file. Is it possible for Postgres errors to be ending up in my Apache log file, and if so, how? What would trigger an error message like that? Thanks!

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• How to create a chained differencing disk of another differencing disk in Virtual Box?

  - by WooYek

  How to create a differencing disk (a chained one) from a disk that is already a differencing image? I would like to have: W2008 (base immutable) - W2008+SQL2008 (differencing, with SQL installed) --- This I can do. - W2008+SQL2008+SharePoint (chained differencing with Sharepoint installed on top of SQL2008) There's some info about it the manual: http://www.virtualbox.org/manual/ch05.html#diffimages Differencing images can be chained. If another differencing image is created for a virtual disk that already has a differencing image, then it becomes a "grandchild" of the original parent. The first differencing image then becomes read-only as well, and write operations only go to the second-level differencing image. When reading from the virtual disk, VirtualBox needs to look into the second differencing image first, then into the first if the sector was not found, and then into the original image.* I don't get it...

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• Is it possible (and safe/reliable/non-damaging) to use a 20-pin ATX PSU with a 24-pin ATX motherboar

  - by Legooolas

  I have a reasonably-decent old 20-pin PSU which I want to use on a newer 24-pin ATX motherboard. I see that the ATX page on wikipedia mentions that 24-pin ATX is backward-compatible, and I can find 20-to-24 pin adapters to buy for a couple of dollars/pounds at lots of places, but I can't find any mention of restrictions on the use of these. Will this work on any motherboard, or is it a per-motherboard compatibility question? Are there any other restrictions like the level of power available (and hence the additional 4 pins with +12, +5 and +3.3V lines which are already on other pins)?

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